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   <div id="projectname">ADC
   &#160;<span id="projectnumber">9.2</span>
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   <div id="projectbrief">Analog to Digital Conversor library for the Teensy 4 microprocessor</div>
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<div class="title">AnalogBufferDMA.h</div>  </div>
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<div class="fragment"><div class="line"><a name="l00001"></a><span class="lineno">    1</span>&#160;<span class="comment">/* Teensy 3.x, LC, 4.0 ADC library</span></div>
<div class="line"><a name="l00002"></a><span class="lineno">    2</span>&#160;<span class="comment"> * https://github.com/pedvide/ADC</span></div>
<div class="line"><a name="l00003"></a><span class="lineno">    3</span>&#160;<span class="comment"> * Copyright (c) 2020 Pedro Villanueva</span></div>
<div class="line"><a name="l00004"></a><span class="lineno">    4</span>&#160;<span class="comment"> *</span></div>
<div class="line"><a name="l00005"></a><span class="lineno">    5</span>&#160;<span class="comment"> * Permission is hereby granted, free of charge, to any person obtaining</span></div>
<div class="line"><a name="l00006"></a><span class="lineno">    6</span>&#160;<span class="comment"> * a copy of this software and associated documentation files (the</span></div>
<div class="line"><a name="l00007"></a><span class="lineno">    7</span>&#160;<span class="comment"> * &quot;Software&quot;), to deal in the Software without restriction, including</span></div>
<div class="line"><a name="l00008"></a><span class="lineno">    8</span>&#160;<span class="comment"> * without limitation the rights to use, copy, modify, merge, publish,</span></div>
<div class="line"><a name="l00009"></a><span class="lineno">    9</span>&#160;<span class="comment"> * distribute, sublicense, and/or sell copies of the Software, and to</span></div>
<div class="line"><a name="l00010"></a><span class="lineno">   10</span>&#160;<span class="comment"> * permit persons to whom the Software is furnished to do so, subject to</span></div>
<div class="line"><a name="l00011"></a><span class="lineno">   11</span>&#160;<span class="comment"> * the following conditions:</span></div>
<div class="line"><a name="l00012"></a><span class="lineno">   12</span>&#160;<span class="comment"> *</span></div>
<div class="line"><a name="l00013"></a><span class="lineno">   13</span>&#160;<span class="comment"> * The above copyright notice and this permission notice shall be</span></div>
<div class="line"><a name="l00014"></a><span class="lineno">   14</span>&#160;<span class="comment"> * included in all copies or substantial portions of the Software.</span></div>
<div class="line"><a name="l00015"></a><span class="lineno">   15</span>&#160;<span class="comment"> *</span></div>
<div class="line"><a name="l00016"></a><span class="lineno">   16</span>&#160;<span class="comment"> * THE SOFTWARE IS PROVIDED &quot;AS IS&quot;, WITHOUT WARRANTY OF ANY KIND,</span></div>
<div class="line"><a name="l00017"></a><span class="lineno">   17</span>&#160;<span class="comment"> * EXPRESS OR IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF</span></div>
<div class="line"><a name="l00018"></a><span class="lineno">   18</span>&#160;<span class="comment"> * MERCHANTABILITY, FITNESS FOR A PARTICULAR PURPOSE AND</span></div>
<div class="line"><a name="l00019"></a><span class="lineno">   19</span>&#160;<span class="comment"> * NONINFRINGEMENT. IN NO EVENT SHALL THE AUTHORS OR COPYRIGHT HOLDERS</span></div>
<div class="line"><a name="l00020"></a><span class="lineno">   20</span>&#160;<span class="comment"> * BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER LIABILITY, WHETHER IN AN</span></div>
<div class="line"><a name="l00021"></a><span class="lineno">   21</span>&#160;<span class="comment"> * ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM, OUT OF OR IN</span></div>
<div class="line"><a name="l00022"></a><span class="lineno">   22</span>&#160;<span class="comment"> * CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE</span></div>
<div class="line"><a name="l00023"></a><span class="lineno">   23</span>&#160;<span class="comment"> * SOFTWARE.</span></div>
<div class="line"><a name="l00024"></a><span class="lineno">   24</span>&#160;<span class="comment"> */</span></div>
<div class="line"><a name="l00025"></a><span class="lineno">   25</span>&#160; </div>
<div class="line"><a name="l00026"></a><span class="lineno">   26</span>&#160; </div>
<div class="line"><a name="l00027"></a><span class="lineno">   27</span>&#160;<span class="preprocessor">#ifndef ANALOGBUFFERDMA_H</span></div>
<div class="line"><a name="l00028"></a><span class="lineno">   28</span>&#160;<span class="preprocessor">#define ANALOGBUFFERDMA_H</span></div>
<div class="line"><a name="l00029"></a><span class="lineno">   29</span>&#160; </div>
<div class="line"><a name="l00030"></a><span class="lineno">   30</span>&#160;<span class="preprocessor">#include &quot;DMAChannel.h&quot;</span></div>
<div class="line"><a name="l00031"></a><span class="lineno">   31</span>&#160;<span class="preprocessor">#include &quot;ADC.h&quot;</span></div>
<div class="line"><a name="l00032"></a><span class="lineno">   32</span>&#160; </div>
<div class="line"><a name="l00033"></a><span class="lineno">   33</span>&#160;<span class="preprocessor">#ifdef ADC_USE_DMA</span></div>
<div class="line"><a name="l00034"></a><span class="lineno">   34</span>&#160; </div>
<div class="line"><a name="l00035"></a><span class="lineno">   35</span>&#160;<span class="comment">// lets wrap some of our Dmasettings stuff into helper class</span></div>
<div class="line"><a name="l00036"></a><span class="lineno">   36</span>&#160;<span class="keyword">class </span>AnalogBufferDMA</div>
<div class="line"><a name="l00037"></a><span class="lineno">   37</span>&#160;{</div>
<div class="line"><a name="l00038"></a><span class="lineno">   38</span>&#160;    <span class="comment">// keep our settings and the like:</span></div>
<div class="line"><a name="l00039"></a><span class="lineno">   39</span>&#160;<span class="keyword">public</span>: <span class="comment">// At least temporary to play with dma settings.</span></div>
<div class="line"><a name="l00040"></a><span class="lineno">   40</span>&#160;<span class="preprocessor">#ifndef KINETISL</span></div>
<div class="line"><a name="l00041"></a><span class="lineno">   41</span>&#160;    DMASetting _dmasettings_adc[2];</div>
<div class="line"><a name="l00042"></a><span class="lineno">   42</span>&#160;<span class="preprocessor">#endif</span></div>
<div class="line"><a name="l00043"></a><span class="lineno">   43</span>&#160;    DMAChannel _dmachannel_adc;</div>
<div class="line"><a name="l00044"></a><span class="lineno">   44</span>&#160; </div>
<div class="line"><a name="l00045"></a><span class="lineno">   45</span>&#160;    <span class="keyword">static</span> AnalogBufferDMA *_activeObjectPerADC[2];</div>
<div class="line"><a name="l00046"></a><span class="lineno">   46</span>&#160;    <span class="keyword">static</span> <span class="keywordtype">void</span> adc_0_dmaISR();</div>
<div class="line"><a name="l00047"></a><span class="lineno">   47</span>&#160;    <span class="keyword">static</span> <span class="keywordtype">void</span> adc_1_dmaISR();</div>
<div class="line"><a name="l00048"></a><span class="lineno">   48</span>&#160;    <span class="keywordtype">void</span> processADC_DMAISR();</div>
<div class="line"><a name="l00049"></a><span class="lineno">   49</span>&#160; </div>
<div class="line"><a name="l00050"></a><span class="lineno">   50</span>&#160;<span class="keyword">public</span>:</div>
<div class="line"><a name="l00051"></a><span class="lineno">   51</span>&#160;    AnalogBufferDMA(<span class="keyword">volatile</span> uint16_t *buffer1, uint16_t buffer1_count,</div>
<div class="line"><a name="l00052"></a><span class="lineno">   52</span>&#160;                    <span class="keyword">volatile</span> uint16_t *buffer2 = <span class="keyword">nullptr</span>, uint16_t buffer2_count = 0) : _buffer1(buffer1), _buffer1_count(buffer1_count), _buffer2(buffer2), _buffer2_count(buffer2_count){};</div>
<div class="line"><a name="l00053"></a><span class="lineno">   53</span>&#160; </div>
<div class="line"><a name="l00054"></a><span class="lineno">   54</span>&#160;    <span class="keywordtype">void</span> init(<a class="code" href="class_a_d_c.html">ADC</a> *adc, int8_t adc_num = -1);</div>
<div class="line"><a name="l00055"></a><span class="lineno">   55</span>&#160; </div>
<div class="line"><a name="l00056"></a><span class="lineno">   56</span>&#160;    <span class="keywordtype">void</span> stopOnCompletion(<span class="keywordtype">bool</span> stop_on_complete);</div>
<div class="line"><a name="l00057"></a><span class="lineno">   57</span>&#160;    <span class="keyword">inline</span> <span class="keywordtype">bool</span> stopOnCompletion(<span class="keywordtype">void</span>) { <span class="keywordflow">return</span> _stop_on_completion; }</div>
<div class="line"><a name="l00058"></a><span class="lineno">   58</span>&#160;    <span class="keywordtype">bool</span> clearCompletion();</div>
<div class="line"><a name="l00059"></a><span class="lineno">   59</span>&#160;    <span class="keyword">inline</span> <span class="keyword">volatile</span> uint16_t *bufferLastISRFilled() { <span class="keywordflow">return</span> (!_buffer2 || (_interrupt_count &amp; 1)) ? _buffer1 : _buffer2; }</div>
<div class="line"><a name="l00060"></a><span class="lineno">   60</span>&#160;    <span class="keyword">inline</span> uint16_t bufferCountLastISRFilled() { <span class="keywordflow">return</span> (!_buffer2 || (_interrupt_count &amp; 1)) ? _buffer1_count : _buffer2_count; }</div>
<div class="line"><a name="l00061"></a><span class="lineno">   61</span>&#160;    <span class="keyword">inline</span> uint32_t interruptCount() { <span class="keywordflow">return</span> _interrupt_count; }</div>
<div class="line"><a name="l00062"></a><span class="lineno">   62</span>&#160;    <span class="keyword">inline</span> uint32_t interruptDeltaTime() { <span class="keywordflow">return</span> _interrupt_delta_time; }</div>
<div class="line"><a name="l00063"></a><span class="lineno">   63</span>&#160;    <span class="keyword">inline</span> <span class="keywordtype">bool</span> interrupted() { <span class="keywordflow">return</span> _interrupt_delta_time != 0; }</div>
<div class="line"><a name="l00064"></a><span class="lineno">   64</span>&#160;    <span class="keyword">inline</span> <span class="keywordtype">void</span> clearInterrupt() { _interrupt_delta_time = 0; }</div>
<div class="line"><a name="l00065"></a><span class="lineno">   65</span>&#160;    <span class="keyword">inline</span> <span class="keywordtype">void</span> userData(uint32_t new_data) { _user_data = new_data; }</div>
<div class="line"><a name="l00066"></a><span class="lineno">   66</span>&#160;    <span class="keyword">inline</span> uint32_t userData(<span class="keywordtype">void</span>) { <span class="keywordflow">return</span> _user_data; }</div>
<div class="line"><a name="l00067"></a><span class="lineno">   67</span>&#160; </div>
<div class="line"><a name="l00068"></a><span class="lineno">   68</span>&#160;<span class="keyword">protected</span>:</div>
<div class="line"><a name="l00069"></a><span class="lineno">   69</span>&#160;    <span class="keyword">volatile</span> uint32_t _interrupt_count = 0;</div>
<div class="line"><a name="l00070"></a><span class="lineno">   70</span>&#160;    <span class="keyword">volatile</span> uint32_t _interrupt_delta_time;</div>
<div class="line"><a name="l00071"></a><span class="lineno">   71</span>&#160;    <span class="keyword">volatile</span> uint32_t _last_isr_time;</div>
<div class="line"><a name="l00072"></a><span class="lineno">   72</span>&#160; </div>
<div class="line"><a name="l00073"></a><span class="lineno">   73</span>&#160;    <span class="keyword">volatile</span> uint16_t *_buffer1;</div>
<div class="line"><a name="l00074"></a><span class="lineno">   74</span>&#160;    uint16_t _buffer1_count;</div>
<div class="line"><a name="l00075"></a><span class="lineno">   75</span>&#160;    <span class="keyword">volatile</span> uint16_t *_buffer2;</div>
<div class="line"><a name="l00076"></a><span class="lineno">   76</span>&#160;    uint16_t _buffer2_count;</div>
<div class="line"><a name="l00077"></a><span class="lineno">   77</span>&#160;    uint32_t _user_data = 0;</div>
<div class="line"><a name="l00078"></a><span class="lineno">   78</span>&#160;    <span class="keywordtype">bool</span> _stop_on_completion = <span class="keyword">false</span>;</div>
<div class="line"><a name="l00079"></a><span class="lineno">   79</span>&#160;};</div>
<div class="line"><a name="l00080"></a><span class="lineno">   80</span>&#160; </div>
<div class="line"><a name="l00081"></a><span class="lineno">   81</span>&#160;<span class="preprocessor">#endif // ADC_USE_DMA</span></div>
<div class="line"><a name="l00082"></a><span class="lineno">   82</span>&#160;<span class="preprocessor">#endif</span></div>
<div class="line"><a name="l00083"></a><span class="lineno">   83</span>&#160; </div>
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